Finding the Fourth Proportional to 257.36, 385.99 and 92.79
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Solution
The fourth proportional to 257.36, 385.99 and 92.79 is: 139.17
Step by Step Solution
- Step 1: Write the proportion equation
257.36 : 385.99 = 92.79 : x - Step 2: Convert to fraction form
257.36/385.99 = 92.79/x - Step 3: Cross multiply
257.36x = 385.99 × 92.79 - Step 4: Simplify right side
257.36x = 35,816.01 - Step 5: Solve for x
x = 35,816.01/257.36 - Step 6: Final answer
x = 139.17
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.